Roller-mill



(No Model.) I 2 Sheets-Sheet 1. J. WEBER.

ROLLER MILL. 1810253330. P atented Feb. 7,1882.

WITNESSES VENTOR.

ATTORNEYS.

N. PETERS. PholoI-ifllognphen Washington, D. C.

(No Model.) 2 sheets sheet 2.

J. WEBER.

ROLLER MILL. ,No. 253,330. Patented Feb. 7,1882.

WITNESSES N. FETERS. Pmwuma n m, Washlnglon. n. c

UNITED STATES PATENT Oriana;

JEAN WVEBER, OF USTER, SWITZERLAND, ASSIGNOR TO JOHN FEIOHTER & I SONS,OF MINNEAPOLIS, MINNESOTA.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 253,330, dated February7, 1882.

Application filed September 21, 1880. (No model.)

To all whom it may concern:

Be it known that I, JEAN WEBER, of Uster, Switzerland,have invented anew and Improved Roller-Mill, of which the following is a specification.

The object of my invention is to provide a new and improvedcrushing-mill for corn, groats, grain, &c., which is simple inconstruction and can be adjusted very conveniently at the differentperiods of the operation, the po-' sition of the rollers being shown bythe position of the regulating-lever.

The invention consists in the construction of parts of the mill, as willbehereinafter fully deprovided with a floor inclined downward towardeach end, so as to guide the material to be ground upon a feed-roller,D, mounted on the horizontal shaft E, which is rotated by a belt, F,passing around a pulley on the shaft G.

The ends of the hopper G areprovided with a sliding gate,I, having asliding bar, I, passing through the guide-plates a 0, attached thereto,which bar is actuated by means of a lever, J, pivoted on the side of thehopper and having a slot, 0, in the innerend, into which a pin, 1), ofthe bar 1 passes. Accordingly as the gates are opened more or less agreater or smaller quantity of grain or corn drops into the chutes K,and from there to the crushingrollers'. The feed-rollers D revolvetowardthe outside, and feed the grain, 850., into thechute K. In thedrawings two pairs of rollers are shown; but any number of pairs may bearranged in one mill, if desired, each pair operating for itselfindependently of the others.

The rollers L and L and M and M are made of porcelain or chilled iron,and may be smooth or roughened or grooved. The rollers L and M aremounted on shaftsGr and G, having rigid journals, and are arranged inthe middle or inner side of the mill, whereas the rollers L and M havemovable or adjustable journals, R, and are arranged on the outside orends of the mill. The shaft G of the roller M is actuated by a beltpassing over its pulley O, and in turn rotates the other rollers bymeans of the cog-wheels P P, &c. The rollers arekept clean by scraper QQ, and the crushedmaterial drops into the receiving-hopper S. Thejournal R of the movable roller L is pressed toward the fixed roller bya spiral bufferspring T, the tension of which may be regulated to acertain extent by means of the screw T, provided with a hand-wheel, N.Thescrew T can be locked in any desired position by means of thelock-nut 0. It is necessary to adjust the rollers at Various distancesfrom each other during the operation, and it is of the greatestimportance that the rollers are always absolutely parallel to eachother. Each journal R is provided with jaws D D on the lower side, andthe upper end,E, of alever, F, pivoted at G is pivoted between thesejaws. An arm, H, is pivoted to the lever F nearits fulcrum, and isprovided with an adjusting-- screw, J, which rests against the lowerendof the lever F. An eccentric, K, is mounted at each end of a horizontalshaft,V, so as to be'in contact with or adjoining the arms H of thelever F, so that they press these arms back ward as soon as the shaft Vis rotated by depressing or raisingits lever W, which is guided by acircularlyslotted guide-plate, X, and can be locked in any desiredposition by means of the thumb-screw nut Y. The plate X is provided witha graduated scale along the circular slot. 7

The operation is as follows: The grain,corn, &c., to be crushed isplaced in the hopper and the slide or gate I is raised more or less, asmay be necessary, by depressing the lever J the feed-rollers D Dpreventing the material from clogging at the slot formed by the openin gof the slide or gate I The material drops from the hopper G into thechute'K,andis delivered in between the rollers. If the rollers -L and Lor M and M are to be separated, the lever W is depressed, therebyrotating the shaft V and causing the eccentrics K K to push the arm H inthe direction of the arrow a"; but as the end of the screw J, secured inthe end of arm 11, presses against the lower end of the leverF,thislower end will movein the same direction, and the upper end, E, of thelever and the journal It also move in the direction of the arrow b-thatis,the roller L is drawn from the roller L; but as soon as the lever \Vis released the buffer-spring T pushes the roller back again, thisspring having been previously adjusted to have the desired tension. Ifitis desired to keep therollers separated, the lever W must be locked inthe depressed position by means of the thumbscrew nut Y. The rollers canthus be separated or brought together gradually, and can be locked atany desired point to maintain their respective positions in relation toeach other. As the two eccentrics acting upon the moving journals aremounted on the same shaft, the two ends of the roller L will movetogether-thatis, the moving roller will always remain parallel to theother roller-which is of greatimporiance for the perfect operation ofthe mill.

The arm H is adjusted in regard to its position on the lever F by meansof the screw J, for by separatingthe lower end of the arm H more or lessfrom the lever F the adjustment can be made so that both ends of theroller L are moved at precisely the same time.

By noting the position of the levers W in the circularly-slotted plateX, which is provided with a scale, the exact position of the roller Lcan immediately be seen.

Having thus described my invention,whatI claim as new, and desire tosecure by Letters Patent, is-- In a crushing-mi1l, the combination, withthe movable journals R, of the lever F, the arm H, pivoted thereto, theadjusting-screw J,and theeccentricsK,substantiallyas herein shown anddescribed, and for the purpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JEAN WEBER. Witnesses M. TAGGE OZLIKER, FH. FALSY.

